Breeding method of high-oilation tropical maize

A technology for high oil corn and corn, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of limited large-scale application, low yield, poor disease resistance, etc., and achieve low yield and high yield potential. , the effect of increasing production

Pending Publication Date: 2018-07-03
FOOD CROPS RES INST YUNNAN ACAD OF AGRI SCI
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Problems solved by technology

However, at present, the high-oil corn varieties bred at home and abroad are mainly temperate corn varieties, which generally show poor disease resistance, and the yield is significantly lower than that of common corn varieties popularized in large areas, which seriously limits its large-scale application in production.

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  • Breeding method of high-oilation tropical maize

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Embodiment 1

[0045] In 1996, the temperate high-oil maize inbred line GY220 (in terms of mass fraction, whole grain crude fat 11.9%) was introduced from China Agricultural University for trial planting in Kunming, Yunnan (25°12′ north latitude, subtropical region), and the high-sensitivity corn ear rot disease and dwarf mosaic disease, the average yield per mu was 9.4% lower than that of Huidan 4, a common corn hybrid widely promoted in Yunnan. In the same year, a tropical maize inbred line CML171 (in terms of mass fraction, whole grain crude fat 4.21%) was introduced from the Mexican International Maize and Wheat Improvement Center (CIMMYT) in Kaiyuan, Yunnan (23°71′ north latitude, subtropical region) for trial planting. Delicate, disease-resistant, good grain commodity, high yield, yellow and hard grains, resistant to corn spot disease, head smut, ear rot and dwarf mosaic disease, etc., with a yield of 316 kg / mu.

[0046] ① hybridization

[0047] In the winter of 1996, F 1 Generation ...

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Abstract

The invention provides a breeding method of high-oilation tropical maize, belonging to the technical field of crop breeding. The breeding method comprises the following steps: hybridizing a temperatehigh-oil corn selfing line as a donor parent with a tropical corn selfing line as a receptor parent, so as to obtain F1 generation seeds; carrying out backcrossing on an F1 generation single plant andtropical corns as a recurrent parent for four rounds, so as to obtain BC4F1 generation seeds; screening seeds in which the areas of embryo planes are 80% of the areas of grain planes from the BC4F1 generation seeds, planting, continuously carrying out selfing on obtained single plants for two generations, so as to obtain BC4F3 generation seeds; and carrying out combining ability determination onthe BC4F3 generation seeds, and adopting the seeds in which the combining ability reaches a remarkable level P which is more than 0.05 and the oil content reaches 9.0% or above as the high-oilation tropical maize. The full-grain crude fat of the high-oilation tropical maize bred by virtue of the breeding method reaches 10.0% or over, and the high-oilation tropical maize simultaneously has excellent disease resistance and high yield.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a breeding method for high oily tropical corn. Background technique [0002] With the continuous improvement of people's living standards in our country, the demand for animal husbandry products is increasing day by day. The feed industry with corn as the pillar has become a pillar industry in my country. Development needs of modern feed industry and processing industry. High-oil corn (oil content > 8%) is a new type of high-quality corn cultivated with high technology. Compared with ordinary corn, high-oil corn has the characteristics of high oil, high energy, and comprehensive nutrition (my country's high-oil corn breeding and its development trend, Song Tongming, China Agricultural Science and Technology Herald, 2001,3(3):40-42). Feed tests at home and abroad show that raising pigs with high-oil corn can increase the daily gain by more than 20% compared wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 番兴明刘丽张培高陈洪梅
Owner FOOD CROPS RES INST YUNNAN ACAD OF AGRI SCI
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